Adapter for electric sockets



Patented Apr. 8, 1924.

UNITED STATES HERBERT o. SMYTH, .111,; nn E. HOBART MoLsoN, [or ,nawyom z. N. it.

ADAPTER Foe E E TRIQ sockets.

Application filed 'se tember'a 92. iserial ssyb' af To Z7 whom'z't may concern: I i

Be it known that we, HERBERT (l. SMYTH,

Jr, and E. Homer MoLsox. citizens'ot the" United States, residing at New York (.itV,'

in the county of New York and State of New York, have invented certain new and useful Improvements inAdaptersforElecf' tric Sockets, of which the followmgis a specification.

serted in lVIarconi-ty'pe sockets whereby socket ready-to receive the regular audion bulb.

In the drawings Figure 1 is an elevation of the adapter.

Figure 2 is a diagrammatic illustration of the contacts in a Marconi socket. Figure 3 is a diagram including top and bottom views of the adapter "andillustrating the wiring connections between the contacts. f i Figure 4 is a horizontal sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a horizontal sectional view" v y p H I p the'top'connecwr I-lis connected electrically taken on the line 5-:) of Figure 1. Figure 6 is a vertical sectional view taken on the line 6-6 of Figure 4.

Figure 7 is a vertical sectional view taken on the line 77 of Figure'4t.

The Aeriotron bulb as is well known has a filament, a plate and a grid but differs from the regular audion bulb in its connections which are in the form of four pins, rather irregularly spaced on the base, two for the filament. one for the grid and one has a bayonet joint and four sprin contacts in the base. two for the filament (F and F Fig. 2), one for the plate (P) and one for the grid (G), but will not receive the Aeriotron bulb which has no bayonet joint connection but depends on frictional contact of the pins with co-operating members ,to make the electrical connections. Also the plate and filament connections on the Aeriotron bulb are transposed from the corresponding contacts in the Marconi socket usedwith audion bulbs.

To have produced an adapter, the upper face of which has soeketed contacts to refor the plate. The ordinary Marconi socket ceive the vpins of the Aeriotron ,b i1lb and the lower face 'of which has pins to engage with-the cont'actsin the Marconi base and at the same timel'iaw' e' transposedthe"fila ment and plate connections the "adapter ;so "that -the- Aeriot'ron filament pin will be in electrical connection withtlie l\Ia rconi socket filament connection F andQthe connection with "the Marconi socket plate connection l7, one filament connectionF and Aeriotron bulbs may be used in connec tion with wireless t-ele ihone sets without dis the gridconnection G remaining the same. Ihetadapter consists" of a cylinder [a {ofnon-conducting material with a groove 7) in the side wall. The filamentconnection 2 and; and connect on 1. .s @kead ar their upper ends and pin-tormed' at their lower endsetteud, r ght through the adapter. said .lower ends being 'designated as lfand 2'.

The tubular top connectorB theplate and the tubular top connector aforthe filanrent each extends] part way through the adapter and the are phi connectionsfin the bottom 3" andkt' aline with themandierb. tend beyond the bottonr but' ea'clr pair of "alined." ctmncctionsj'is insulated the upperandlmver mil-ts isf concerned," In

far. as

order that" the circuits f may be transposed with the bottom connector 4 by screw 3*, wire 3 and screw 3 and the top connector -i with the bottom connector 3 by screw,

I V 'Aeriotron" plate. pin will "be in electrical, W Our invention relatcsto adapters to' be 1n- 4. wire 49 and screw 4, the wires o and 4. lying in the groove 7). A pin 0 extends from the side wall of the adapter to engage the bayonet slot in the Marconi socket in order that the adapter will be properly inserted in the socket. A depression d in'the top of the adapter receives the button in the bottom of the Aeriotron bulb.

The through contacts in the adapter contact with the filament contact and grid con- "tact in the Aeriotron bulb and the filament contact- F and. grid contact G in the adapter and allowing 2 and 3 to go straight:- through we arrive at the same electrical circuit, and by n'ioving the pin c to the proper position the adapter will make the correct contacts in the 3' arconi socket.

By inserting our adapter in the Marconi socket and then pushing the A eriotron bulb pins into the top connectors the keriotron bulb is automatically and properly connected into the existing circuits and by rcmoving: the adapter the Marconi socket is ready to receive a regular 'audion bulb.

It is apparent that by transposing the wires leading to connections P and G in the Marconi socket and making all the connectors in the adapter straightthrough like. 1 and '2 the Aeriotron bulb can be used in the Marconi socket instead of the audion bulb but we prefer the transposed connections as it im'olves no change in the wiring of the circuits.

While we have shown and described the adapter body as composed of a block of nonconducting material we to not limit ourselves to this particular construction as any structure which will receive an Aeriotron" bulb at one end and fit a l\-Iarconi socket at the other end and is provided with suitable conductors therethrough is within the scope of our invention.

We claim z.

1. A tube adapter for wireless apparatus comprising a body presenting at one side thereof a set of socket contacts and at the other side presenting a separate set of tube contacts, and electrical cross connections be tween the tube plate contact and the socket plate contact, and also between the tube filament contact and the socket filament contact. thereby to adapt. the circuit oi. the tube to the circuit of the socket.

2. A tube adapter for wirclcz-s apparatus comprising an insulating body. a set of socket contacts at one side of the body and a set of tube contacts at the other side of the body, one pair of contacts of the tube set and one pair of contacts of the socket set being in direct electrical conta t, and another pair of the contacts of the tube set and the socket set hein ehictrically cross connected to thereby adapt the tube circuit to the socket circuit.

3. tube adapter for wireless apparatus comprising an insulating body, a pair of" socketed contact members extending entire- 1y through said body, a pair of socketed tube contact members extending partly through said body, a pair of socket contacts, and electrical cross connection between said tube contact members and the said socket contacts.

4. A tube adaptcr for wireless apparatus comprising an insulating body having an annular groove, a socketed contact extending lotnritudinall through the body to the opposite side thereof, a pair of socketcd tube contact members terminating within the insulating body. a separate pair of socket contacts carried by the end of the body opposite the tube contact members and cross wiring connections arranged in said groove and cross connecting the tube contact members and socket contacts.

In testimony whereof We have afiixed our signatures.

HERBERT C. SMYTH, JR. E. HOBART MOLSON. 

